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← TechnologyWhich outcome results on a three-phase power system when an upstream transformer's automatic recloser misinterprets feeder voltage instability as a permanent fault?
A)Cascading service outage propagates downstream✓
B)Harmonic resonance increases line losses
C)Transformer core saturation experiences overheating
D)Increased reactive power reverses grid flow
💡 Explanation
A cascading outage occurs because the automatic recloser activating inappropriately invokes feeder lockout, therefore disrupting power delivery further down the line, rather than the effects of harmonics or reactive power, that require different specific triggers.
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